Many automobiles are spaghetti towers. The longer a model or drivetrain is in production, the more spaghetti. I drive a 1985 Volkswagen Vanagon. Its ancestors had horizontally opposed four cylinder air-cooled engines in the rear, like all ancestral VWs. In 1984 the Vanagon got water cooled, but still horizontally opposed four cylinder rear-engine. The plumbing is, as they say, like a submarine. Some later Vanagon models layered onto this concept four-wheel drive and air conditioning. Talk about plumbing.
Of course, most every automobile wiring system grew from simple ignition-lights-radio-heater-fan-windshield-wipers to include airplane-like control panels, wireless entry locks, theft alarms, seatbelt buzzers, seat warmers, electric windows, seats, hatches, sun roofs, and steering-wheel adjusters. I think four fuse panels is the norm now. My modern diesel pickup truck had two batteries, two alternators, and every gizmo in the catalog, layered onto the basic automotive wiring system.
Many automobiles are spaghetti towers. The longer a model or drivetrain is in production, the more spaghetti. I drive a 1985 Volkswagen Vanagon. Its ancestors had horizontally opposed four cylinder air-cooled engines in the rear, like all ancestral VWs. In 1984 the Vanagon got water cooled, but still horizontally opposed four cylinder rear-engine. The plumbing is, as they say, like a submarine. Some later Vanagon models layered onto this concept four-wheel drive and air conditioning. Talk about plumbing.
Of course, most every automobile wiring system grew from simple ignition-lights-radio-heater-fan-windshield-wipers to include airplane-like control panels, wireless entry locks, theft alarms, seatbelt buzzers, seat warmers, electric windows, seats, hatches, sun roofs, and steering-wheel adjusters. I think four fuse panels is the norm now. My modern diesel pickup truck had two batteries, two alternators, and every gizmo in the catalog, layered onto the basic automotive wiring system.